Differential D12970 Diff 43792 intern/cycles/integrator/path_trace_display.cpp

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intern/cycles/integrator/path_trace_display.cpp

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	PathTraceDisplay::PathTraceDisplay(unique_ptr<DisplayDriver> driver) : driver_(move(driver))			PathTraceDisplay::PathTraceDisplay(unique_ptr<DisplayDriver> driver) : driver_(move(driver))
	{			{
	}			}

	void PathTraceDisplay::reset(const BufferParams &buffer_params)			void PathTraceDisplay::reset(const BufferParams &buffer_params)
	{			{
	thread_scoped_lock lock(mutex_);			thread_scoped_lock lock(mutex_);

	const DisplayDriver::Params old_params = params_;

	params_.full_offset = make_int2(buffer_params.full_x, buffer_params.full_y);			params_.full_offset = make_int2(buffer_params.full_x, buffer_params.full_y);
	params_.full_size = make_int2(buffer_params.full_width, buffer_params.full_height);			params_.full_size = make_int2(buffer_params.full_width, buffer_params.full_height);
	params_.size = make_int2(buffer_params.width, buffer_params.height);			params_.size = make_int2(buffer_params.width, buffer_params.height);

	/* If the parameters did change tag texture as unusable. This avoids drawing old texture content
	* in an updated configuration of the viewport. For example, avoids drawing old frame when render
	* border did change.
	* If the parameters did not change, allow drawing the current state of the texture, which will
	* not count as an up-to-date redraw. This will avoid flickering when doping camera navigation by
	* showing a previously rendered frame for until the new one is ready. */
	if (old_params.modified(params_)) {
	texture_state_.is_usable = false;
	}

	texture_state_.is_outdated = true;			texture_state_.is_outdated = true;
	}			}

	void PathTraceDisplay::mark_texture_updated()			void PathTraceDisplay::mark_texture_updated()
	{			{
	texture_state_.is_outdated = false;			texture_state_.is_outdated = false;
	texture_state_.is_usable = true;
	}			}

	/* --------------------------------------------------------------------			/* --------------------------------------------------------------------
	* Update procedure.			* Update procedure.
	*/			*/

	bool PathTraceDisplay::update_begin(int texture_width, int texture_height)			bool PathTraceDisplay::update_begin(int texture_width, int texture_height)
	{			{
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	}			}

	bool PathTraceDisplay::draw()			bool PathTraceDisplay::draw()
	{			{
	/* Get parameters within a mutex lock, to avoid reset() modifying them at the same time.			/* Get parameters within a mutex lock, to avoid reset() modifying them at the same time.
	* The drawing itself is non-blocking however, for better performance and to avoid			* The drawing itself is non-blocking however, for better performance and to avoid
	* potential deadlocks due to locks held by the subclass. */			* potential deadlocks due to locks held by the subclass. */
	DisplayDriver::Params params;			DisplayDriver::Params params;
	bool is_usable;
	bool is_outdated;			bool is_outdated;

	{			{
	thread_scoped_lock lock(mutex_);			thread_scoped_lock lock(mutex_);
	params = params_;			params = params_;
	is_usable = texture_state_.is_usable;
	is_outdated = texture_state_.is_outdated;			is_outdated = texture_state_.is_outdated;
	}			}

	if (is_usable) {
	driver_->draw(params);			driver_->draw(params);
	}

	return !is_outdated;			return !is_outdated;
	}			}

	CCL_NAMESPACE_END			CCL_NAMESPACE_END